At this point you should be able to start/enable nut-server.service. If it has started successfully, you can run upsc upsname to get information from the UPS. Example output from the command:

This software is the combined effort of many individuals and companies with free and open source code licensed under the terms of GNU Public License (GPL), see the NUT license text for specific details. Apr 09, 2026: After a long lapse, attention was paid to the jNut Java Client (library, example CLI program, REST API bundle), culminating in jNut 1.0 release with full support of NUT networked protocol as of NUT v2.8.5 release (including STARTTLS and TRACKING features)

You can also use the upscmd command to send commands to the UPS. For example, to send a shutdown command to the UPS: ... Replace myuser and mypassword with your actual NUT server credentials. The NUT client logs its activities in the /var/log/nut directory. If you encounter any issues with the NUT client, you can check the log files in this directory for error messages and diagnostic information.

November 4, 2021 - Done The following additional packages will be installed: bash-completion libupsclient4 Suggested packages: nut-monitor The following NEW packages will be installed: bash-completion libupsclient4 nut-client 0 upgraded, 3 newly installed, 0 to remove and 28 not upgraded. Need to get 673 kB of archives. After this operation, 2,348 kB of additional disk space will be used. Do you want to continue? [Y/n] ... root@linuxappserver [/var/log]# upsc tripplite@vmserver ups.status Init SSL without certificate database OL

January 7, 2026 - Be sure PIPEFN and LOCKFN point to a folder that esists, I’ve seen it point to /etc/nut/upssched/ instead of /etc/nut If it does, create the folder or update these variables. ... This post is licensed under CC BY 4.0 by the author. ... I Went to COMPUTEX 2026. Here's What Actually Stood Out. GPU-Accelerated Remote Desktop on Linux from macOS - the Hard Way

May 15, 2026 - Services will require prior configuration: nut-{client,driver,server,monitor}

echo "starting nut-client" sudo /etc/init.d/nut-client restart · · # fsd is normally called when a ups is OB (On Battery) and LB (Low Battery) # fsd = Full Shut Down · · echo "the following command should list current information about your ups" echo "upsc $UPS_NAME@$NUT_SERVER" ·

May 11, 2026 - The jNut package (client side, Beta) has been split into its own GitHub repository. NUT Java support: sources and JAR of the library and example client jNUT 1.1

August 15, 2021 - CMDSCRIPT /etc/nut/upssched-cmd PIPEFN /etc/nut/upssched.pipe LOCKFN /etc/nut/upssched.lock # ============================================================================ AT ONBATT * START-TIMER onbatt 300 AT ONLINE * CANCEL-TIMER onbatt online AT LOWBATT * EXECUTE onbatt AT COMMBAD * START-TIMER commbad 30 AT COMMOK * CANCEL-TIMER commbad commok AT NOCOMM * EXECUTE commbad AT SHUTDOWN * EXECUTE powerdown

Now we have to add the generated connection string into the /etc/nut/upsmon.conf file: ... # Examples: # # MONITOR myups@bigserver 1 monmaster blah master # MONITOR su700@server.example.com 1 upsmon secretpass slave # MONITOR myups@localhost 1 upsmon pass master (or slave) MONITOR APCBU1400@localhost 1 monitor [REDACTED] master # --------------------------------------------------------------------------

February 24, 2025 - # On server journalctl -f -u nut-server # On client journalctl -f -u nut-monitor · On the NUT Pi server, you can use upscmd to manage the connected UPS, using the admin user, for example:

service nut-client restart · upsc apc-1500@<IPADDRESS> Init SSL without certificate database · battery.charge: 100 · battery.charge.low: 10 · battery.charge.warning: 50 · battery.date: 2054/00/39 · battery.mfr.date: 2008/10/20 · battery.runtime: 156 ·

For this example, we’ll have a UPS called "sparky" that uses the apcsmart driver and is connected to /dev/ttyS1. That’s the second serial port on most Linux-based systems. The entry in ups.conf looks like this: ... To start and stop drivers, use upsdrvctl of upsdrvsvcctl (installed on operating systems with a service management framework supported by NUT).

Network UPS Tools (NUT) is a client/server monitoring system that allows computers to share uninterruptible power supply (UPS) and power distribution unit (PDU) hardware. Clients access the hardware through the server, and are notified whenever the power status changes.

February 4, 2025 - If you were using an older version ...NUT-Client ") for an automatic import of your parameters during the first launch · Start WinNUT V2 and modify the parameters according to your needs · If your NUT server is hosted on a Synology ...

October 17, 2025 - Set this to true to allow starting the upsd NUT data server even if not all LISTEN directives can be honoured at the moment. This environment variable overrides the built-in "false" flag in the upsd program, and an optional same-named default flag that can be set in upsd.conf. If you want a data server always running, even if it would potentially not serve all clients ...

This package provides NUT's clients that allows the user to control and monitor the UPS.

Most of the NUT units are now WantedBy=nut.target (which is in turn WantedBy=multi-user.target and so bound to system startup). You should only systemctl enable those units you need on this system — this allows it to not start the daemons you do not need (e.g. not run upsd NUT data server on systems which are only upsmon secondary clients).

March 15, 2026 - apt update apt install nut nut-client nut-server -y